156422131 has 2 divisors, whose sum is σ = 156422132. Its totient is φ = 156422130.

The previous prime is 156422113. The next prime is 156422141. The reversal of 156422131 is 131224651.

It is a happy number.

Together with previous prime (156422113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 156422131 - 2⁵ = 156422099 is a prime.

It is a super-2 number, since 2×156422131² = 48935766133162322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 156422096 and 156422105.

It is not a weakly prime, because it can be changed into another prime (156422111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78211065 + 78211066.

It is an arithmetic number, because the mean of its divisors is an integer number (78211066).

Almost surely, 2^156422131 is an apocalyptic number.

156422131 is a deficient number, since it is larger than the sum of its proper divisors (1).

156422131 is an equidigital number, since it uses as much as digits as its factorization.

156422131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 25.

The square root of 156422131 is about 12506.8833447826. The cubic root of 156422131 is about 538.8063839223.

Adding to 156422131 its reverse (131224651), we get a palindrome (287646782).

The spelling of 156422131 in words is "one hundred fifty-six million, four hundred twenty-two thousand, one hundred thirty-one".